Ignore a job when there isn't a "data" key available.
Safe fetching a deleted job removes the deleted job from queue.
Merge pull request #181 from selwin/del-on-nosuchjob

Safe fetching a deleted job removes the deleted job from queue.
Allow rqworker to run more silently.
Allow rqworker to run more silently.
Update changelog.
Bump version to 0.3.6.
Prepare for next 0.3.x version.
Remove .env.fish.
Merge branch 'master' into scheduler-integration